Harmonica-shaped tube type air-cooled energy storage battery box

Abstract

The utility model provides a harmonica-shaped tube type air-cooled energy storage battery box which comprises a battery box body and a module in the battery box body, the module comprises battery cells and harmonica-shaped tubes which are arranged at intervals, and the two ends of each harmonica-shaped tube are open and are respectively communicated with air uniformizing holes and a cooling fan on the battery box body; along the direction away from the cooling fan, the inner width of the first harmonica-shaped tube is W1, the inner width of the last harmonica-shaped tube is W2, W2 is equal to 2 * W1, the inner width of the other harmonica-shaped tubes is W3, and W3 is equal to (2.1-2.2) * W1. The harmonica-shaped tube can effectively slow down the expansion deformation of the battery cell; the radiating air ducts uniformly distributed in the harmonica-shaped tube can effectively improve the distribution uniformity of air in the vertical direction and the air velocity under the same flow, and the radiating uniformity and the radiating efficiency are improved; by configuring harmonica-shaped tubes with different inner widths and air uniformizing holes with different distribution densities, the heat dissipation uniformity of the battery cells at different positions in the module is improved, and the overall cycle performance and service life of the module are effectively improved.

Description

Technical Field

[0001] The utility model relates to the technical field of battery boxes, in particular to a harmonica tube type air-cooled energy storage battery box. Background Art

[0002] With the development of lithium battery energy storage technology, the energy storage battery box, as the basic unit of the energy storage system, directly affects the life and safety of the energy storage battery.

[0003] At present, the cooling methods of energy storage battery boxes are mainly air cooling and liquid cooling. Air cooling has the advantages of simple installation and low cost, but the current air cooling method has uneven heat dissipation and low heat dissipation efficiency, resulting in excessive temperature rise and large temperature difference in the battery cells, which is quite unfavorable for the cycle of the battery cells. Utility Model Content

[0004] The purpose of the utility model is to provide a harmonica tube type air-cooled energy storage battery box to address the deficiencies of the above-mentioned background technology, so as to achieve uniform air intake in the battery box and effectively avoid the adverse effects of heat accumulation and uneven temperature on the battery cell cycle.

[0005] The technical solution of the utility model is: a harmonica tube type air-cooled energy storage battery box, which includes a battery box body and a module inside thereof, wherein the module includes spaced-apart battery cells and harmonica tubes, and both ends of the harmonica tube are open, respectively connected to the air balancing holes and the heat dissipation fan on the battery box body.

[0006] Preferably, a plurality of the modules are provided along the opening direction of the harmonica tube, and adjacent modules are connected by a ventilation rack, and the ventilation rack divides the inner cavity of the battery box into a plurality of independent small cavities, and the heat dissipation fan is connected to the small cavities through the ventilation rack.

[0007] Preferably, the ventilation rack is provided with a first ventilation port and a second ventilation port, the harmonica pipes in adjacent modules are connected through the first ventilation port, and the first ventilation port is connected with the heat dissipation fan through the second ventilation port.

[0008] Preferably, the harmonica tubes are provided on both sides of each of the battery cells; along the direction away from the heat dissipation fan, the inner width of the first harmonica tube is W1, the inner width of the last harmonica tube is W2, W2=2×W1, and the inner width of the remaining harmonica tubes is W3, W3=(2.1~2.2)×W1.

[0009] Preferably, the arrangement direction of the air balancing holes on the battery box is consistent with the arrangement direction of the battery cells in the module, and the distribution density of the air balancing holes increases in the direction away from the heat dissipation fan.

[0010] Preferably, the half of the module close to the heat dissipation fan has 0.25n air balancing holes evenly distributed on its outer side; the half of the module away from the heat dissipation fan has n air balancing holes evenly distributed on its outer side; wherein n is the number of battery cells in each module.

[0011] Preferably, the harmonica tube includes a shell and partitions inside the shell, a group of relative side walls of the shell are open, and another group of relative side walls respectively abut against different battery cells, and the partitions are evenly distributed along the height direction of the shell to separate the shell into a plurality of heat dissipation ducts.

[0012] Preferably, the cross-section of the heat dissipation duct is trapezoidal or rectangular.

[0013] The beneficial effects of the utility model are as follows: the harmonica tube has good shape stability due to its own rigidity and deformation resistance, and can effectively slow down the expansion and deformation of the battery cell, thereby improving its cycle performance and lifespan; the heat dissipation ducts evenly distributed inside the harmonica tube can effectively improve the vertical distribution uniformity of air and the air flow rate under the same flow rate, thereby improving the heat dissipation uniformity and heat dissipation efficiency; by configuring harmonica tubes with different inner widths and air balancing holes with different distribution densities, the heat dissipation uniformity of the battery cells at different positions in the module can be improved, thereby effectively improving the overall cycle performance and lifespan of the module. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 It is an external structure diagram of an embodiment of the utility model;

[0015] Figure 2 It is an internal structure diagram of an embodiment of the utility model;

[0016] Figure 3 is a side view of a module in an embodiment of the utility model;

[0017] In the figure:

[0018] 1. Battery box; 1-1. Air holes;

[0019] 2. Module; 2-1. Cell; 2-2. Harmonica tube; 2-21. Shell; 2-22. Partition; 2-3. End plate;

[0020] 3. Cooling fan; 3-1. First vent; 3-2. Second vent;

[0021] 4. Ventilation rack. DETAILED DESCRIPTION

[0022] The technical solution of the embodiment of the utility model is described in detail below with reference to the accompanying drawings.

[0023] In the description of the embodiments of the present utility model, it should be understood that the orientation or positional relationship indicated by the terms "top", "bottom", etc. is based on the orientation or positional relationship shown in the accompanying drawings, and is only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present utility model. In the description of the present utility model, it should be noted that, unless otherwise clearly specified and limited, the terms "set" and "connect" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be directly connected, or indirectly connected through an intermediate medium, or it can be a connection between the two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood by specific circumstances.

[0024] Reference Figure 1-2 A harmonica tube type air-cooled energy storage battery box comprises a battery box body 1, a module 2, a heat dissipation fan 3 and a ventilation rack 4. The battery box body 1 is a three-dimensional shell structure, and a set of opposite side walls thereof are provided with air distribution holes 1-1. The ventilation rack 4 divides the inner cavity of the battery box body 1 into a plurality of independent small cavities, and each small cavity is provided with a module 2; the heat dissipation fan 3 is arranged on the other side wall of the battery box body 1, and is connected with the small cavity through the ventilation rack 4, and cools the battery cell 2-1 in the module 2 by sucking the air entering the small cavity from the air distribution holes 1-1. Among them, the module 2 includes battery cells 2-1 and harmonica tubes 2-2 arranged at intervals, harmonica tubes 2-2 are provided on both sides of each battery cell 2-1, and an end plate 2-3 for fixing is provided on the outer side of the harmonica tube 2-2 at the end, and both ends of the harmonica tube 2-2 are opened, which are respectively connected to the air balancing holes 1-1 and the heat dissipation fan 3 on the battery box 1. When the heat dissipation fan 3 is started, the outside air enters the battery box 1 through the air balancing holes 1-1, and then flows to the heat dissipation fan 3 through the harmonica tube 2-2 and the ventilation frame 4, so as to effectively dissipate the heat of the battery cells 2-1.

[0025] Reference Figure 3The harmonica tube 2-2 includes a shell 2-21 and a partition 2-22 inside the shell. A group of relative side walls of the shell 2-21 are open, and another group of relative side walls respectively abut against different battery cells 2-1. The partitions 2-22 are evenly distributed along the height direction of the shell 2-21 to separate the shell 2-21 into a plurality of heat dissipation ducts. The provision of the partition 2-22 not only increases the rigidity and compression resistance of the harmonica tube 2-2, but also allows the harmonica tube 2-2 to maintain a stable shape when the battery cell 2-1 expands, and provides a certain reaction force to the battery cell 2-1, thereby reducing the deformation of the battery cell 2-1 and the resulting problems such as reduced capacity and deterioration of cycle performance of the battery cell 2-1. In addition, it can also make the air passing through the harmonica tube 2-2 more evenly distributed in the vertical direction. On the one hand, it can prevent the uneven convergence of the air flow inside the battery box 1 caused by the installation position of the heat dissipation fan 3, which causes the uneven heat dissipation of the battery cell 2-1 in the vertical direction. On the other hand, it can also improve the heat dissipation efficiency. This is because the air distribution becomes more even and the cross-sectional area of ​​the air circulation channel becomes smaller. Under the synergistic effect of the two, the air flow rate increases, the heat dissipation efficiency is improved, and the heat dissipation effect is enhanced.

[0026] The connection method between the above-mentioned partition 2-22 and the inner wall of the shell 2-21 can be configured according to actual needs, and no specific restrictions are made here. For example, the partition 2-22 can be perpendicular to the inner wall of the shell 2-21 to construct a heat dissipation duct with a rectangular cross-section, or it can form a certain angle with the inner wall of the shell 2-21 to construct a heat dissipation duct with a trapezoidal cross-section.

[0027] In order to further improve the heat dissipation efficiency, the arrangement directions of the above-mentioned battery cells 2-1, harmonica tubes 2-2 and air equalizing holes 1-1 are consistent, and the ventilation frame 4 is provided with a first vent 3-1 and a second vent 3-2. The direction of the first vent 3-1 is consistent with the direction of the air equalizing hole 1-1, and the harmonica tubes 2-2 in adjacent modules 2 are connected through the first vent 3-1. The second vent is consistent with the direction of the heat dissipation fan 3, so as to connect the first vent 3-1 with the heat dissipation fan 3.

[0028] The shape of the ventilation rack 4 can be configured according to actual use requirements, and the utility model does not impose specific restrictions. For example, it can include a frame that is adapted to the shape and size of the side of the module 2, and a second vent 3-2 is opened on the side of the frame close to the heat dissipation fan 3. A drainage pipe, a drainage groove, etc. can also be configured between the second vent 3-2 and the heat dissipation fan 3 to achieve structural docking between the heat dissipation fan 3 and the ventilation rack 4. It should be noted that during implementation, the small cavity separated by the ventilation rack 4 should not be able to exchange gas with the outside in any other way except for being connected to the first vent 3-1 and the air balancing hole 1-1, so as to ensure that the air always flows in the direction of the air balancing hole 1-1, the heat dissipation duct, the first vent 3-1, the second vent 3-2 and the heat dissipation fan 3 to ensure the heat dissipation effect.

[0029] In order to further improve the uniformity of heat dissipation inside the battery case 1, the harmonica tubes 2-2 in the module 2 are configured with different inner widths in the present embodiment. Specifically: along the direction away from the heat dissipation fan 3, the inner width of the first harmonica tube 2-2 is W1, the inner width of the last harmonica tube 2-2 is W2, W2=2×W1, and the inner width of the remaining harmonica tubes 2-2 is W3, W3=(2.1~2.2)×W1. This is because the end plate 2-3 has a certain heat dissipation effect on the adjacent harmonica tubes 2-2, and the closer the harmonica tubes 2-2 and the battery cells 2-1 are to the heat dissipation fan 3, the higher the air flow rate and heat dissipation efficiency. By adopting the above technical scheme, the uniformity of heat dissipation of each battery cell 2-1 can be improved, uneven heat accumulation can be prevented, and the cycle efficiency of the battery cell 2-1 can be improved.

[0030] Similarly, different numbers of air balancing holes 1-1 can be configured according to the different distances between the battery cells 2-1 and the heat dissipation fan 3, and the air intake volumes at different positions of the module 2 can be adjusted to be similar so as to improve the uniformity of heat dissipation. Specifically: the distribution density of the air balancing holes 1-1 increases in the direction away from the heat dissipation fan 3. In some specific implementation schemes, the battery cells 2-1 in each module 2 are divided into two halves. The half of the battery cells 2-1 close to the heat dissipation fan 3 has 0.25n air balancing holes 1-1 evenly distributed on its outside, and the half of the battery cells 2-1 away from the heat dissipation fan 3 has n air balancing holes 1-1 evenly distributed on its outside, where n is the number of battery cells 2-1 in each module 2.

[0031] The working principle of the utility model is as follows: during the charging and discharging process of the battery cell 2-1, the heat generated causes the temperature of the battery cell 2-1 to rise. When the temperature of the battery cell 2-1 reaches the opening value of the heat dissipation fan 3, the heat dissipation fan 3 is turned on, and the cold air outside the battery box 1 enters the harmonica tube 2-2 through the air balancing hole 1-1 and fully exchanges heat with the battery cell 2-1. The hot air after heat exchange flows to the heat dissipation fan 3 through the ventilation rack 4, and is then discharged from the battery box 1.

[0032] Compared with the prior art, the beneficial effects of the utility model are: the harmonica tube 2-2 has good shape stability due to its own rigidity and anti-deformation ability, and can effectively slow down the expansion and deformation of the battery cell 2-1, thereby improving its cycle performance and life; the heat dissipation ducts evenly distributed inside the harmonica tube 2-2 can effectively improve the vertical distribution uniformity of air and the air flow rate under the same flow rate, thereby improving the heat dissipation uniformity and heat dissipation efficiency; by configuring harmonica tubes 2-2 with different inner widths and air balancing holes 1-1 with different distribution densities, the heat dissipation uniformity of the battery cells 2-1 located at different positions in the module 2 is improved, thereby effectively improving the overall cycle performance and life of the module 2.

[0033] The above are preferred implementations of the present utility model. It should be pointed out that, for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the principle of the present utility model. These improvements and modifications should also be regarded as the protection scope of the present utility model.

Claims

1. A harmonica tube type air-cooled energy storage battery box, It is characterized in that The invention comprises a battery box and a module inside the battery box. The module comprises battery cells and harmonica tubes arranged at intervals. Both ends of the harmonica tube are open and respectively connected to the air distribution holes and the heat dissipation fan on the battery box.

2. A harmonica tube type air-cooled energy storage battery box according to claim 1, It is characterized in that A plurality of the modules are arranged along the opening direction of the harmonica tube, and adjacent modules are connected by ventilation racks. The ventilation racks divide the inner cavity of the battery box into a plurality of independent small cavities, and the heat dissipation fan is connected to the small cavities through the ventilation racks.

3. A harmonica tube type air-cooled energy storage battery box according to claim 2, It is characterized in that The ventilation rack is provided with a first ventilation port and a second ventilation port, the harmonica pipes in adjacent modules are connected through the first ventilation port, and the first ventilation port is connected with the heat dissipation fan through the second ventilation port.

4. A harmonica tube type air-cooled energy storage battery box according to claim 3, It is characterized in that The harmonica tubes are provided on both sides of each battery cell; along the direction away from the cooling fan, the inner width of the first harmonica tube is W 1 The inner width of the last harmonica tube is W 2 , W 2 =2×W 1 , the inner width of the remaining harmonica tube is W 3 , W 3 =(2.1~2.2)×W 1 .

5. A harmonica tube type air-cooled energy storage battery box according to any one of claims 1-4, It is characterized in that The arrangement direction of the air balancing holes on the battery box is consistent with the arrangement direction of the battery cells in the module, and the distribution density of the air balancing holes increases in the direction away from the heat dissipation fan.

6. A harmonica tube type air-cooled energy storage battery box according to claim 5, It is characterized in that The half of the module close to the heat dissipation fan has 0.25n air balancing holes evenly distributed on its outer side; the half of the module away from the heat dissipation fan has n air balancing holes evenly distributed on its outer side; wherein n is the number of battery cells in each module.

7. A harmonica tube type air-cooled energy storage battery box according to any one of claims 1-4 and 6, It is characterized in that The harmonica tube includes a shell and partitions inside the shell. One group of relative side walls of the shell are open, and another group of relative side walls respectively abut against different battery cells. The partitions are evenly distributed along the height direction of the shell to separate the shell into a plurality of heat dissipation ducts.

8. The harmonica tube type air-cooled energy storage battery box according to claim 7, It is characterized in that The cross section of the heat dissipation air duct is trapezoidal or rectangular.

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